ref: e8603799ceaa3ef49d8a193b315f2cac94bb358f
parent: 469b6871283ee08925584726368cd100c4275fef
author: Jacob Moody <moody@posixcafe.org>
date: Fri Nov 17 16:14:39 EST 2023
else, more expr, slice and arrays
--- a/n.y
+++ b/n.y
@@ -48,7 +48,7 @@
long ival;
}
-%token FUNC DEF IF FOR MOD USE OR AND NOTEQ SHIFTL SHIFTR STRUCT
+%token FUNC DEF IF FOR MOD USE OR AND NOTEQ EQ SHIFTL SHIFTR STRUCT ELSE
%token TYPE NAME NUM
%token <sval> NAME TYPE;
@@ -68,7 +68,7 @@
sdecls
:
-| sdecls NAME ':' TYPE ';'
+| sdecls NAME ':' type ';'
def
: DEF NAME TYPE
@@ -80,20 +80,32 @@
addtype($2);
}
+type
+: TYPE
+| type '[' ']'
+| type '[' NUM ']'
+| type '!'
+
return
-: '-' '>' TYPE
+: '-' '>' type
|
unary
: NUM
-| NAME
+| NAME
+| '<' '-' NAME
+| '(' expr ')'-mulexpr
-: mulexpr '*' unary
-| mulexpr '/' unary
-| mulexpr '%' unary
+sufexpr
+: unary '--'
+| unary '++'
| unary
+mulexpr
+: mulexpr '*' sufexpr
+| mulexpr '/' sufexpr
+| mulexpr '%' sufexpr
+| sufexpr
addexpr
: addexpr '+' mulexpr
@@ -100,13 +112,19 @@
| addexpr '-' mulexpr
| mulexpr
-compexpr
-: compexpr '>' addexpr
-| compexpr '<' addexpr
-| compexpr NOTEQ addexpr
+shifexpr
+: shifexpr SHIFTL addexpr
+| shifexpr SHIFTR addexpr
| addexpr
+compexpr
+: compexpr '>' shifexpr
+| compexpr '<' shifexpr
+| compexpr NOTEQ shifexpr
+| compexpr EQ shifexpr
+| shifexpr
+
logexpr
: logexpr OR compexpr
| logexpr AND compexpr
@@ -122,7 +140,7 @@
| stmts stmt
decl
-: NAME ':' TYPE
+: NAME ':' type
| NAME ':' '=' expr
stmt
@@ -129,9 +147,13 @@
: expr ';'
| '{' stmts '}'| decl ';'
+| FOR '(' expr ')' stmt+| FOR '(' expr ';' expr ';' expr ')' stmt+| IF '(' expr ')' stmt ELSE stmt+| IF '(' expr ')' stmtarg
-: NAME TYPE
+: NAME type
args
:
@@ -153,9 +175,11 @@
"&&", AND,
"||", OR,
"!=", NOTEQ,
+ "==", EQ,
"<<", SHIFTR,
">>", SHIFTL,
"struct", STRUCT,
+ "else", ELSE,
};
Biobuf *bin;
@@ -249,7 +273,7 @@
case '*': case '/':
case '%': case ':':
case '>': case '<':
- case ',':
+ case ',': case '.':
return c;
}
ungetc();
@@ -267,7 +291,6 @@
return TYPE;
}
}
-
if(isdigit(buf[0])){yylval.ival = atoi(buf);